Home / 98,721.72-136,239.66-56,279.16

Finding the Fourth Proportional to 98,721.72, 136,239.66 and 56,279.16

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Solution

The fourth proportional to 98,721.72, 136,239.66 and 56,279.16 is: 77,667.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,721.72 : 136,239.66 = 56,279.16 : x
  2. Step 2: Convert to fraction form
    98,721.72/136,239.66 = 56,279.16/x
  3. Step 3: Cross multiply
    98,721.72x = 136,239.66 × 56,279.16
  4. Step 4: Simplify right side
    98,721.72x = 7,667,453,623.49
  5. Step 5: Solve for x
    x = 7,667,453,623.49/98,721.72
  6. Step 6: Final answer
    x = 77,667.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.